/*
 * Copyright (c) 2011, Nikolaus Moll
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * * Neither the name of the gradecalculator.net nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */
package net.gradecalculator.plugin.core.factory.impl;

import java.util.LinkedList;
import java.util.List;

import net.gradecalculator.core.interfaces.ICourse;
import net.gradecalculator.core.interfaces.IModule;
import net.gradecalculator.core.interfaces.IRegulationsItem;

public class CoreModule extends AbstractCoreRegulationsItem implements IModule {
	private float ects = 0;
	private int hoursperweek = 0;
	private int gradedCourses = 0;

	@Override
	public float getECTS() {
		return ects;
	}

	@Override
	public int getHoursPerWeek() {
		return hoursperweek;
	}

	@Override
	public List<ICourse> getCourses() {
		final List<ICourse> result = new LinkedList<ICourse>();
		for (final IRegulationsItem item : getChildren()) {
			result.add((ICourse) item);
		}
		return result;
	}

	@Override
	public void setCourses(final List<ICourse> courses) {
		final List<IRegulationsItem> children = new LinkedList<IRegulationsItem>();
		for (final ICourse item : courses) {
			children.add(item);
		}
		setChildren(children);
	}

	@Override
	public void addCourse(final ICourse course) {
		addChild(course);
	}

	@Override
	public void removeCourse(final ICourse course) {
		removeChild(course);
	}

	@Override
	public void addChild(final IRegulationsItem item) {
		super.addChild(item);

		final ICourse course = (ICourse) item;
		ects += course.getECTS();
		hoursperweek += course.getHoursPerWeek();
		if (!course.getGradedPerformance().isEmpty()) {
			gradedCourses++;
		}
	}

	@Override
	public void removeChild(final IRegulationsItem item) {
		super.removeChild(item);

		final ICourse course = (ICourse) item;
		ects -= course.getECTS();
		hoursperweek -= course.getHoursPerWeek();
		if (!course.getGradedPerformance().isEmpty()) {
			gradedCourses--;
		}
	}

	@Override
	public boolean isGraded() {
		return (gradedCourses > 0);
	}

	@Override
	public void insertCourse(final ICourse course, final ICourse courseBefore) {
		insertChild(course, courseBefore);
	}

	@Override
	public boolean isAddable(final IRegulationsItem item) {
		if (item instanceof ICourse) {
			return true;
		}

		return false;
	}

}
